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Pickup Truck air condition

rainmaster's Avatar
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06-02-02, 06:57 AM   #1  
Pickup Truck air condition

I have a 1987 GMC pickup, what must I do to convert my air conditioner form R12 to the R134 freeon.

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Joe_F's Avatar
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06-02-02, 07:13 AM   #2  
R12 works best in vehicle that was designed for it......R134A is not as efficienct of a replacement.

At minimum: New orifice screen, new dryer, new hoses, new O rings, flush out the old oil and replace with R134A compatible oil.

I have used Autofrost which is an R12 replacement with success in my older GM cars.

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